Opponent can alter my civ selection

I picked French and found my civ is abbassids. Opponenet name was “Why you play abbassids”. At first I thought I was just confused, until I checked my OBS record. Then I checkd this player match history, he gets a lot of abba players even against one tricks that never play Abba.
I am pretty sure he is doing something that reset the civ selection and since abbassids start with A, the civ selection get reset to abba.
I can’t attach the video but I can share it via youtube if needed.